Stephen,
Can you provide more details as to the pattern and aspect ratios involved?  Have
you considered using Silicon?  How about Fotofab?  I've never used them, but it
looks like they can do about 1/2 mil over 6":
http://www.fotofab.com/Design_Considerations/Tolerances/tolerances.html
Neal

  Stephen Bart  wrote: I am looking for vendors who
can construct a 6 in shadow mask with 1 mil
(25um) or better
resolution.

Any suggestions?

--
*******************************************************************

Stephen F. Bart, Ph.D.

Technical Fellow, Core Technology Development

Coventor, Inc.
625 Mount Auburn Street
Cambridge, MA 02138 USA

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